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VB.NET Regular Expression to Check Email Addresses 2008-06-01 02:45:00 VB.NET Regular Expression to Validate Email
Addresses Imports System.Text.RegularExpressions Function IsValid_eMail_Address(ByVal sEmailAdd As String) Return Regex.IsMatch(sEmailAdd, "[0-9a-zA-Z]([-.\w]*[0-9a-zA-Z_+])*@([0-9a-zA-Z][-\w]*[0-9a-zA-Z]\.)+[a-zA-Z]{2,9}$" End Function The above will check for email like sales@dotnetdud.com etc and will reject sample@vbadud.c Or -@vbadu Read more:Check
VB.NET Regular Expression to Check MAC Address 2008-06-01 02:44:00 Regular Expression to Validate MAC Address
Imports System.Text.RegularExpressions Function IsValid_MAC_Address(ByVal sMacAdd As String) Return Regex.IsMatch(sMacAdd, "/^([0-9a-fA-F]{2}:){5}[0-9a-fA-F]{2}$") End Function The above will check for MAC Address like 22:13:35:67:49:ab etc Read more:Check
Regular Expression to Check Zip Code 2008-06-01 02:42:00 Regular Expression to Match Zip Code Imports System.Text.RegularExpressions Function IsValidZip(ByVal sZipCode As String) Return Regex.IsMatch(sZipCode, "^\d{5}(\-\d{4})?$") End Function The above will check for U.S . Zip codes like 55001-2434. 94941-3232 etc To Check
Indian Zip codes use Imports System.Text.RegularExpressions Function IsValidZip(ByVal sZ
Change the Target .NET Framework Version of an Existing Project 2008-06-20 21:56:00 Change the Target
.NET Framework
Version of an Existing Project
This procedure describes how to change the .NET Framework version target of an existing project.To change the .NET Framework version of a project1. In Visual Studio 2008, open the project you want to change.2. Right-click the project in Solution Explorer and then click Properties. Doing this displays the Project Designer.3. Go to the T Read more:Change
Preventing Office Addin from loading Everytime when Application Opens 2008-07-21 22:51:00 When add-in is created its LoadBehavior registry value is 3 in the Setup project. This results in every Office session add-in load. Change the value of 3 to 1 for not loading the add-in by defaultRegistry key is available HKEY_CLASSES_USER\Software\Microsoft\Office\\Addins\\LoadBehavior (Registry Value for LoadBehavior) (Office Addin when Automatic Loaded) Preventing Excel Addin from loading Every Read more:Everytime
, Application
Creating a Serialized Class using VB.NET 2008-07-20 21:36:00 Storing objects in a flat file using VB.NET Serialization/ Retrieving object data from file using Vb.NET Deserialization In the following example, let us look at a way by which we can make user-defined classes Serializable. The first step is to have attribute added to the class as Public Class CVideoLibraryOrder Now the objects that are derived from the classes can be serialized Im Read more:Creating
Solution for Error Type 'IDeserializationCallback' is not defined. 2008-07-20 21:31:00 This error occurs when the class implements IDeserializationCallback interface but the required import directives are not available Public Class CVideoLibraryOrder Implements IDeserializationCallback Public VID As Integer Solution
: Use the following Imports statement at the beginning of the class/module Imports System.Runtime.Serialization Each source file can contain any Read more:defined
Programmatically Change the Caption of Windows Form using C# 2008-07-20 21:29:00 Set Dialog / Form start-up position through C# code for Windows
form private void InitializeComponent() { this.components = new System.ComponentModel.Container(); this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font; this.Text = "New Form"; this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen; Read more:Change
, Caption
Overload resolution failed because no accessible 'New' can be called with these arguments: 2008-07-20 21:27:00 'Public Sub New(handle As Microsoft.Win32.SafeHandles.SafeFileHandle, access As System.IO.FileAccess)': Argument not specified for parameter 'handle'. 'Public Sub New(handle As System.IntPtr, access As System.IO.FileAccess)': Argument not specified for parameter 'handle'. 'Public Sub New(path As String, mode As System.IO.FileMode)': Argument not specified for parameter 'path'. O Read more:arguments
Office host applications and their support for add-ins 2008-07-20 21:23:00 Host Shared Add-In VSTO 2005 SE Add-In Access 2003 Yes No Excel 2003 Yes Yes FrontPage 2003 Yes No Outlook 2003* Yes Yes PowerPoint 2003 Yes Yes Project 2003 Yes No Publisher 2003
Get Stored Text from Clipboard using VB.NET 2008-08-12 06:59:00 Extract Text from Clipboard
using Vb.NET / Extract Clipboard Text from using Vb.NET Sub Get_Text_From_ClipBoard() Try If My.Computer.Clipboard.ContainsText() Then Dim ClipText As String ClipText = My.Computer.Clipboard.GetText MsgBox(ClipText) Else MsgBox("No Text in ClipBoard") End If
Get Stored Images from Clipboard using VB.NET 2008-08-12 06:59:00 Extract Images
from Clipboard
using Vb.NET Sub Get_Image_From_ClipBoard() Try If My.Computer.Clipboard.ContainsImage() Then Dim ClipImage As System.Drawing.Image ClipImage = My.Computer.Clipboard.GetImage Me.Background = ClipImage Else MsgBox("No Images in ClipBoard") End If Catch ex
Clear Clipboard Content using VB.NET 2008-08-12 06:59:00 VB.NET Code to Delete ClipboardContent
s Sub Delete_ClipBoard_Content() Try My.Computer.Clipboard.Clear
() Catch ex As Exception MessageBox.Show(ex.Message) End Try End Sub
Validate Windows Form Controls in Vb.Net 2008-08-01 00:06:00 Validation Controls for Windows
Forms (VB.NET) The Windows Forms ErrorProvider component is used to validate user input on a form or control. It is typically used in conjunction with validating user input on a form, or displaying errors within a dataset. An error provider is a better alternative than displaying an error message in a message box, because once a message box is dismissed, the error m Read more:Validate
Visual Studio 2008 Image Library 2008-08-01 00:06:00 The Visual
Studio 2008 ImageLibrary
is a collection of application images that appear in Microsoft Windows, Microsoft Office, Microsoft Visual Studio
, and other Microsoft software. You can use this set of over 1,000 images to create applications that look visually consistent with Microsoft software.The image library includes three main categories of images: animations, bitmaps, and icons. A readm
Calculating Time taken for an operation using VB.NET (in Milliseconds) 2008-08-01 00:06:00 Calculate Processing Time for a Vb.NET Subroutine (accuracy to millisecond)Not every project will have the luxury of having rational analyzer to check the process time for every subroutine/function. In those cases we can use the StopWatch to determine the time taken for a programImports System.Diagnostics Sub Get_Accurate_ProcessTime() Dim oWatch As New Stopwatch oWatch.Start()
Use of unassigned local variable 'name' 2008-08-25 00:44:00 The C# compiler does not allow the use of uninitialized variables. If the compiler detects the use of a variable that might not have been initialized, it generates CS0165. string Sample; Nullable FlagComplete = null; if (FlagComplete.HasValue) { MessageBox.Show(Sample); } Use new to create an instance of an object o
Argument '1': cannot convert from 'System.Text.StringBuilder' to 'string' 2008-08-25 00:44:00 Use ‘ToString’ to convert the StringBuilder to String // Appending String - using String Builder System
.Text.StringBuilder CompleteAddress1 = new System.Text.StringBuilder(); CompleteAddress1.Append( "105, Annanagar "); CompleteAddress1.Append( "Chennai "); CompleteAddress1.Append( "Tamil Nadu "); // Error Code Read more:Argument
Avoiding Temporary Strings in C# / Reduce Unnecessary Garbage Collection in C# 2008-08-25 00:44:00 Appending strings to existing will produce garbage collection overhead for the program. Instead use Append method of StringBuilder class or Concat, Join methods of String classThe following code differentiates between both : private void stringbuilder_example() { // Appending String - Garbage
Collection - Immutable string CompleteAddress = ""; Comp Read more:Temporary
Nullable Variables in C# 2008-08-25 00:44:00 A type is said to be nullable if it can be assigned a value or can be assigned nullNothingnullptra null reference (Nothing in Visual Basic), which means the type has no value whatsoever. Consequently, a nullable type can express a value, or that no value exists. For example, a reference type such as String is nullable, whereas a value type such as Int32 is not. A value type cannot be nullable bec
Using Directive in C#, Create an alias in C# 2008-08-25 00:44:00 Before you can use the classes in a given namespace in a C# program, you must add a using directive for that namespace to your C# source file. In some cases, you must also add a reference to the DLL that contains the namespaceThe using directive has two uses:· To allow the use of types in a namespace so that you do not have to qualify the use of a type in that namespace:using System;using Read more:Directive
Creating Simple Windows Forms Application using C# 2008-08-25 00:44:00 1. Start Visual Studio.2. Create a WindowsApplication
called HelloWorld. 3. From the Toolbox, drag a Label control onto the form.4. Double Click the label to add an event handler.5. Insert the following code: private void label1_Click(object sender, EventArgs e) { MessageBox.Show("Hello World"); } How to create Windows Forms
Appl Read more:Creating
, Simple
DateSerial Function in VB.NET / Check if the Date is in DayLightSaving Range using VB.NET 2008-08-14 21:49:00 How to Check
if the Date is in DayLightSaving Range
using VB.NETVB.NET’s DAteTime function can be used to give the same output VBA’s DateSerial function Sub GetDate() Dim MyDate As DateTime MyDate = New DateTime(2008, 8, 15) MsgBox(DateSerial(2008, 8, 15)) If MyDate.IsDaylightSavingTime() = True Then MsgBox("Specified day is within daylightsaving time") End If End Sub
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